delete pics to save space

2023-08-03 09:22:52 +08:00
commit de60cd6ed4
1334 changed files with 66221 additions and 0 deletions
--- a/入门篇/U1/1.1.cpp
+++ b/入门篇/U1/1.1.cpp
@ -0,0 +1,10 @@
+//1.1.1
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"I love programming"<<endl;
+	while(true){;
+	}
+return 0;
+}
--- a/入门篇/U1/1.2.cpp
+++ b/入门篇/U1/1.2.cpp
@ -0,0 +1,11 @@
+//1.1.1
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"<EFBFBD>С<EFBFBD>3.14"<<endl;
+	cout<<"<EFBFBD><EFBFBD>= 3.14159265358979323846264338327950288<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"; 
+	while(true){;
+	}
+return 0;
+}
--- a/入门篇/U1/1.3.cpp
+++ b/入门篇/U1/1.3.cpp
@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+int w;
+w=90/3/3;
+cout<<"5̨<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>6<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<5*6*w<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+while(true);
+} 
--- a/入门篇/U1/1.4.cpp
+++ b/入门篇/U1/1.4.cpp
@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+int w;
+w=100/4/5;
+cout<<"7<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>105<EFBFBD>ֲָ<EFBFBD>Ҫ<EFBFBD><EFBFBD>"<<105/7/w<<"<EFBFBD><EFBFBD>"<<endl;
+while(true);
+} 
--- a/入门篇/U1/1.5.cpp
+++ b/入门篇/U1/1.5.cpp
@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫȥ<EFBFBD><EFBFBD>"<<58%8<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+cout<<"ÿ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>"<<58/8<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"; 
+
+while(true);
+} 
--- a/入门篇/U1/1.6.cpp
+++ b/入门篇/U1/1.6.cpp
@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+long double d;
+d=0.6/5;
+cout<<"<EFBFBD><EFBFBD>16֧Ǧ<EFBFBD><EFBFBD>Ҫ"<<d*16<<"ԪǮ";
+while(true);
+}
--- a/入门篇/U1/1.7.cpp
+++ b/入门篇/U1/1.7.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+cout<<"ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>791<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD>Ĳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<3.2*791/2.8<<"<EFBFBD><EFBFBD>";
+while(true);
+}
--- a/入门篇/U1/1.8.cpp
+++ b/入门篇/U1/1.8.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+long double size_;
+int s1;
+int s2;
+s1=10*8;
+s2=s1-16;
+size_=pow(s2,0.5);
+cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>δ<EFBFBD>ש<EFBFBD>߳<EFBFBD>"<<size_<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
+while(true);
+}
+
--- a/入门篇/U2/2.1.1.cpp
+++ b/入门篇/U2/2.1.1.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"ant\n_3cq\nmy\nfriend\nMycar\nmy_car\nall\na_abc\ndaf_32\nmaxn";
+	while(true);
+}
--- a/入门篇/U2/2.1.2.cpp
+++ b/入门篇/U2/2.1.2.cpp
@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a=998;
+	float b=3.1415926535897;
+	char c='a';
+	double d=1.0/3;
+	long double e=8.0/9;
+	long f=999999999999999999999;
+	cout<<a<<endl<<b<<endl<<c<<endl<<d<<endl<<e<<endl<<f<<endl;
+	
+	while(true);
+	
+	return 0;
+}
--- a/入门篇/U2/2.1.3.cpp
+++ b/入门篇/U2/2.1.3.cpp
@ -0,0 +1,8 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	char a='b';
+	cout<<a;
+	while(true);
+}
--- a/入门篇/U2/2.2.1.cpp
+++ b/入门篇/U2/2.2.1.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"B,C";
+	while(true);
+} 
--- a/入门篇/U2/2.2.2.cpp
+++ b/入门篇/U2/2.2.2.cpp
@ -0,0 +1,11 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"y=m*x+b"<<endl;
+	cout<<"m=(a+b+c)/(e*f)"<<endl;
+	cout<<"a=sqrt((x-3*y)*z)"<<endl;
+	cout<<"a=(2*x-y)/(x+pow(y,2))"<<endl;
+	cout<<"m=(x-y*z)/(2/c)";
+	while(true); 
+}
--- a/入门篇/U2/2.2.3.cpp
+++ b/入门篇/U2/2.2.3.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"C,E,F";
+	while(true);
+} 
--- a/入门篇/U2/2.2.4.cpp
+++ b/入门篇/U2/2.2.4.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"11\n9\n10\n9\n10\n10\n50\n21";
+	while(true);
+} 
--- a/入门篇/U2/2.2.5.cpp
+++ b/入门篇/U2/2.2.5.cpp
@ -0,0 +1,8 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"4 3 4\n4 4 3"<<endl<<endl<<"==========="<<endl;
+	cout<<"2 1";
+	while(true);
+} 
--- a/入门篇/U2/2.2.6.cpp
+++ b/入门篇/U2/2.2.6.cpp
@ -0,0 +1,10 @@
+#include<iostream>
+#include<cmath> 
+using namespace std;
+int main()
+{
+	cout<<"ceil(3.14)="<<ceil(3.14)<<" floor(3.14)="<<floor(3.14)<<endl;
+	cout<<"4^3.0="<<pow(4,3.0)<<endl;
+	cout<<"sqrt(9)="<<sqrt(9)<<endl;
+	while(true);
+}
--- a/入门篇/U2/2.2.7.cpp
+++ b/入门篇/U2/2.2.7.cpp
@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int m=540/(120+150);
+	cout<<"<EFBFBD><EFBFBD><EFBFBD>꼶<EFBFBD>ֵ<EFBFBD>"<<m*120<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+	cout<<"<EFBFBD><EFBFBD><EFBFBD>꼶<EFBFBD>ֵ<EFBFBD>"<<m*150<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
+	while(true);
+}
--- a/入门篇/U2/2.2.8.cpp
+++ b/入门篇/U2/2.2.8.cpp
@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a,b;
+	cin>>a>>b;
+	cout<<a<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<b<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<a%b;
+	while(true);
+}
--- a/入门篇/U2/2.3.1.cpp
+++ b/入门篇/U2/2.3.1.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"3 3\n3 8\n11 8\nc=1\nc=1.375\n";
+	while(true);
+}
--- a/入门篇/U2/2.3.2.cpp
+++ b/入门篇/U2/2.3.2.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+#include<string>
+#include<sstream>
+using namespace std;
+int main()
+{
+	char a;
+	string x;
+	stringstream b;
+		b.flush();
+		cin>>x;
+		for(int i=0;i<x.size();i++){
+			a=x[i];
+			a=219-a;
+			b<<a;
+		}
+		x="";
+		b>>x;
+		cout<<x<<endl;
+	while(1==1);
+}
--- a/入门篇/U2/2.3.3.cpp
+++ b/入门篇/U2/2.3.3.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+#include<string>
+#include<sstream>
+using namespace std;
+int main()
+{
+	char a;
+	string x;
+	stringstream b;
+		b.flush();
+		cin>>x;
+		for(int i=0;i<x.size();i++){
+			a=x[i];
+			a=97+(a-97+17)%24;
+			b<<a;
+		}
+		x="";
+		b>>x;
+		cout<<x<<endl;
+	while(1==1);
+}
--- a/入门篇/U2/2.4.1.cpp
+++ b/入门篇/U2/2.4.1.cpp
@ -0,0 +1,10 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	float a;
+	while(true){
+		cin>>a;
+		cout<<a<<"<EFBFBD>H"<<"="<<(a-32)/1.8<<"<EFBFBD><EFBFBD>"<<endl; 
+	}
+}
--- a/入门篇/U2/2.4.2.cpp
+++ b/入门篇/U2/2.4.2.cpp
@ -0,0 +1,12 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	float a,b,c,p;
+	while(true){
+		cin>>a>>b>>c;
+		p=(a+b+c)/2.0;
+		cout<<"S="<<sqrt(p*(p-a)*(p-b)*(p-c))<<endl;
+	}
+}
--- a/入门篇/U2/2.4.3.cpp
+++ b/入门篇/U2/2.4.3.cpp
@ -0,0 +1,11 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a;
+	while(true){
+		cin>>a;
+		a=a*1001;
+		cout<<a/7/11/13<<endl;
+	}
+}
--- a/入门篇/U2/2.5.1.cpp
+++ b/入门篇/U2/2.5.1.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"a=202"<<endl;
+	cout<<"2*a=404"<<endl;
+	cout<<"a=202"<<endl;
+	cout<<"2323.343450"<<endl;
+	cout<<"             2323.34"<<endl;
+	cout<<"2323.34"<<endl;
+	cout<<"2323.34"<<endl;
+	cout<<"============"<<endl<<endl;
+	cout<<"1, 1,001,123,123 ,00123";
+	while(true);
+}
--- a/入门篇/U2/2.6.1.cpp
+++ b/入门篇/U2/2.6.1.cpp
@ -0,0 +1,13 @@
+#include<iostream>
+#include<cstdio>
+using namespace std;
+int main()
+{
+	int a,n,m;
+	cin>>n>>m>>a;
+	int x,y;
+	x=n/a;
+	y=m/a;
+	cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<x*y<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
+	while(true);
+}
--- a/入门篇/U2/2.6.2.cpp
+++ b/入门篇/U2/2.6.2.cpp
@ -0,0 +1,13 @@
+#include<iostream>
+#include<cstdio>
+#include<cmath>
+using namespace std;
+int main()
+{
+	while(true){
+	  double R,X,P;
+	  cin>>X>>R>>P;
+	  cout<<P<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ"<<X*pow(1+R/100.0,P)<<endl;
+    }
+	
+}
--- a/入门篇/U2/2.6.3.cpp
+++ b/入门篇/U2/2.6.3.cpp
@ -0,0 +1,13 @@
+#include<iostream>
+#include<cstdio>
+#include<cmath>
+using namespace std;
+int main()
+{
+	double a,b,c,d;
+	while(true){
+	cin>>a>>b>>c;
+	d=20-a-b-c;
+	printf("<EFBFBD><EFBFBD>Ӧȥ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>%G<><47><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>ʯͷ\n",d);
+    }
+}
--- a/入门篇/U2/2.6.4.cpp
+++ b/入门篇/U2/2.6.4.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+#include<cstdio>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int i=0;
+	double a,b;
+	while(true){
+		cin>>a>>b;
+		if(a<b)cout<<a<<" % "<<b<<"="<<a;
+		else{
+			if(a==b)cout<<a<<" % "<<b<<"="<<0;
+			else{
+			for(i=1;i*b<a;i++);
+			cout<<a<<" % "<<b<<"="<<a-b*(i-1);
+		}
+		}
+		cout<<endl;
+	}
+}
--- a/入门篇/U2/2.6.5.cpp
+++ b/入门篇/U2/2.6.5.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+#include<cmath>
+#include<cstdlib>
+#include<ctime>
+using namespace std; 
+int main()
+{
+	srand(time(0));
+	int a,b,c;
+	a=rand()%1000000+1;
+	b=rand()%1000000+1;
+	c=rand()%1000000+1;
+	cout<<a<<"-"<<b<<"+"<<c<<"+"<<c<<"*("<<a<<"-"<<b<<")="<<a-b+c+c*(a-b)<<endl;
+	while(true);
+}
--- a/入门篇/U3/3.1.1(1).cpp
+++ b/入门篇/U3/3.1.1(1).cpp
@ -0,0 +1,12 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int a,b;
+	cout<<"a,b=";
+	cin>>a>>b;
+	if(a=b)cout<<a;
+	else cout<<"Unequal";
+	while(true);
+}
--- a/入门篇/U3/3.1.1(2).cpp
+++ b/入门篇/U3/3.1.1(2).cpp
@ -0,0 +1,12 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int a,b;
+	cout<<"a,b=";
+	cin>>a>>b;
+	if(a==b)cout<<a;
+	else cout<<"Unequal";
+	while(true);
+}
--- a/入门篇/U3/3.1.2(1).cpp
+++ b/入门篇/U3/3.1.2(1).cpp
@ -0,0 +1,16 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int a,b,c=0,d=0;
+	cout<<"a,b=";
+	cin>>a>>b;
+	if(a>b)
+	{
+		c=a/b;
+		d=a%b;
+	} 
+	cout<<c+d;
+	while(true);
+}
--- a/入门篇/U3/3.1.2(2).cpp
+++ b/入门篇/U3/3.1.2(2).cpp
@ -0,0 +1,14 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int a,b,c=0,d=0;
+	cout<<"a,b=";
+	cin>>a>>b;
+	if(a>b)
+		c=a/b;
+		d=a%b;
+	cout<<c+d;
+	while(true);
+}
--- a/入门篇/U3/3.1.3.cpp
+++ b/入门篇/U3/3.1.3.cpp
@ -0,0 +1,16 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int n,a,b,c,m;
+	while(true){
+		cin>>n;
+		a=n/100;
+		b=n/10-a*10;
+		c=n-a*100-b*10;
+		m=a*a*a+b*b*b+c*c*c;
+		if(n==m)cout<<"Yes"<<endl;
+		else cout<<"No"<<endl;
+	}
+} 
--- a/入门篇/U3/3.2.1.cpp
+++ b/入门篇/U3/3.2.1.cpp
@ -0,0 +1,17 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int b,g;
+	while(true)
+	{
+		cin>>b>>g;
+		if((b+g)<10) cout<<"water"<<endl;
+		else{
+			if(b>g) cout<<"tree"<<endl;
+			else cout<<"tea"<<endl;
+		}
+		
+	}
+}
--- a/入门篇/U3/3.2.2.cpp
+++ b/入门篇/U3/3.2.2.cpp
@ -0,0 +1,18 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int g;
+	while(true)
+	{
+		cin>>g;
+		if(!(g>30))
+		{
+			if(g<=10) cout<<"<EFBFBD><EFBFBD>Ҫ "<<0.8*g<<"Ԫ"<<endl;
+			if(g>10&&g<=20) cout<<"<EFBFBD><EFBFBD>Ҫ "<<0.75*g<<"Ԫ"<<endl;
+			if(g>20&&g<=30) cout<<"<EFBFBD><EFBFBD>Ҫ "<<0.7*g<<"Ԫ"<<endl;
+		}
+		else cout<<"<EFBFBD>޷<EFBFBD><EFBFBD>ʼģ<EFBFBD>"<<endl;
+	}
+}
--- a/入门篇/U3/3.2.3.cpp
+++ b/入门篇/U3/3.2.3.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int x,y;
+	while(true)
+	{
+		cin>>x>>y;
+		x=abs(x);
+		y=abs(y);
+		if(x<=1&&y<=1) cout<<"Yes"<<endl;
+		else cout<<"No"<<endl;
+	}
+}
--- a/入门篇/U3/3.2.4.cpp
+++ b/入门篇/U3/3.2.4.cpp
@ -0,0 +1,20 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int a;
+	while(true)
+	{
+		cin>>a;
+		if((a%123>=97)&&(a%123<=122)) cout<<char(a%123)<<endl;
+		else
+		{
+		if((a%91>=65)&&(a%91<=90))	cout<<char(a%91)<<endl;
+		else
+		{
+			cout<<"*"<<endl;
+		} 
+		} 
+	}
+}
--- a/入门篇/U3/3.3.1.cpp
+++ b/入门篇/U3/3.3.1.cpp
@ -0,0 +1,11 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"A:"<<endl;
+	cout<<"B:x=2"<<endl;
+	cout<<"C:z =7"<<endl;
+	cout<<"D:x=2"<<endl;
+	cout<<"E:z =6";
+	while(true);
+}
--- a/入门篇/U3/3.3.2.cpp
+++ b/入门篇/U3/3.3.2.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	float a,b,c;
+	while(true)
+	{
+		cin>>a>>b>>c;
+		if(!((a+b>c)&&(a+c>b)&&(b+c>a))) cout<<"No!"<<endl;
+		else
+		{
+			if(a==b&&a==c) cout<<"<EFBFBD>ȱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+			else
+			{
+				if((a*a+b*b==c*c)||(a*a+c*c==b*b)||(b*b+c*c==a*a)) cout<<"ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+				else cout<<"һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+			}
+		}
+	}
+}
--- a/入门篇/U3/3.3.3.cpp
+++ b/入门篇/U3/3.3.3.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int f;
+	while(true)
+	{
+		cin>>f;
+		if(f>90) cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+		else
+		{
+			if(f/10==8) cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+			else
+			{
+				if(f>=60&&f<80) cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+				else cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>"<<endl;
+			}
+		}
+	}
+}
--- a/入门篇/U3/3.4.1.cpp
+++ b/入门篇/U3/3.4.1.cpp
@ -0,0 +1,6 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	
+} 
--- a/入门篇/U3/3.4.2.cpp
+++ b/入门篇/U3/3.4.2.cpp
@ -0,0 +1,22 @@
+#include<iostream>
+#include<cmath>
+using namespace std; 
+int main()
+{
+	int a;
+	while(true)
+	{
+		cin>>a;
+		switch(a)
+		{
+			case 1:cout<<"Monday"<<endl;break;
+			case 2:cout<<"Tuesday"<<endl;break;
+			case 3:cout<<"Wednesday"<<endl;break;
+			case 4:cout<<"Thursday"<<endl;break;
+			case 5:cout<<"Friday"<<endl;break;
+			case 6:cout<<"Saturday"<<endl;break;
+			case 7:cout<<"Sunday"<<endl;break;
+			default:cout<<"Sorry!"<<endl;
+		}
+	}
+}
--- a/入门篇/U3/3.4.3.cpp
+++ b/入门篇/U3/3.4.3.cpp
@ -0,0 +1,40 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int y,m; 
+bool p()
+{
+	if(y%400==0) return 1;
+	if(y%100==0) return 0;
+	if(y%4==0) return 1;
+	return 0;
+}
+
+int main()
+{
+	
+	while(true)
+	{
+		cin>>y>>m;
+		switch(m)
+		{
+			case 1:cout<<"31days"<<endl;break;
+			case 2:{
+				if(p())cout<<"29days"<<endl;
+				else cout<<"28days"<<endl;
+				break;
+			}
+			case 3:cout<<"31days"<<endl;break;
+			case 4:cout<<"30days"<<endl;break;
+			case 5:cout<<"31days"<<endl;break;
+			case 6:cout<<"30days"<<endl;break;
+			case 7:cout<<"31days"<<endl;break;
+			case 8:cout<<"31days"<<endl;break;
+			case 9:cout<<"30days"<<endl;break;
+			case 10:cout<<"31days"<<endl;break;
+			case 11:cout<<"30days"<<endl;break;
+			case 12:cout<<"31days"<<endl;break;
+		}
+		
+	}
+}
--- a/入门篇/U3/3.4.4.cpp
+++ b/入门篇/U3/3.4.4.cpp
@ -0,0 +1,22 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a;
+	while(true)
+	{
+		cout<<"[1]apples"<<endl<<"[2]pears"<<endl<<"[3]oranges"<<endl<<"[4]grapes"<<endl<<"[0]Exit"<<endl;
+		cin>>a;
+		cout<<"price= ";
+		switch(a)
+		{
+			case 1:cout<<3.0;break;
+			case 2:cout<<2.5;break;
+			case 3:cout<<4.2;break;
+			case 4:cout<<10.2;break;
+			case 0:return 0;
+			default:cout<<0;
+		}
+		cout<<endl<<endl;
+	}
+} 
--- a/入门篇/U3/3.5.1.cpp
+++ b/入门篇/U3/3.5.1.cpp
@ -0,0 +1,12 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	long double x;
+	while(true)
+	{
+		cin>>x;
+		if(x=0.5) cout<<"0.5 min"<<endl;
+		else cout<<(x-0.5)/0.2+3<<" min"<<endl;
+	}
+}
--- a/入门篇/U3/3.5.2.cpp
+++ b/入门篇/U3/3.5.2.cpp
@ -0,0 +1,20 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	long double a;
+	while(true)
+	{
+		cin>>a;
+		if(a>=0&&a<5) cout<<a+2.5<<endl;
+		else
+		{
+			if(a>=5&&a<10) cout<<2-1.5*(a-3)*(a-3)<<endl;
+			else
+			{
+				if(a>=10&&a<20) cout<<a/2-1.5<<endl;
+				else cout<<"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч!"<<endl;
+			}
+		}
+	}
+}
--- a/入门篇/U3/3.5.3.cpp
+++ b/入门篇/U3/3.5.3.cpp
@ -0,0 +1,24 @@
+#include<iostream>
+#include<string> 
+using namespace std;
+int main()
+{
+	string a;
+	while(true)
+	{
+		cin>>a;
+		cout<<a<<"<EFBFBD><EFBFBD>"<<a.size()<<"λ<EFBFBD><EFBFBD>"<<endl;
+		for(int i=0;i<a.size();i++)
+		{
+			switch(i+1)
+			{
+				case 1:cout<<"<EFBFBD><EFBFBD>λ ";break;
+				case 2:cout<<"ʮλ ";break;
+				case 3:cout<<"<EFBFBD><EFBFBD>λ ";break;
+				case 4:cout<<"ǧλ ";break;
+			}
+			cout<<a[a.size()-i-1]<<endl;
+		}
+		cout<<endl;
+	}
+}
--- a/入门篇/U3/3.5.4.cpp
+++ b/入门篇/U3/3.5.4.cpp
@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	double i;
+	while(true)
+	{
+		cin>>i;
+		if(i<=10){ cout<<((int) i*0.1/1000)*1000;continue;	}
+		if(i>10&&i<20){ cout<<((int) (10*0.1+(i-10)*0.75)/1000)*1000;continue;	}
+		if(i>=20&&i<40){ cout<<((int) (10*0.1+10*0.075+(i-20)*0.05)/1000)*1000;continue;	}
+		if(i>=40&&i<60){ cout<<((int) (10*0.1+10*0.075+20*0.05+(i-40)*0.03)/1000)*1000;continue;	}
+		if(i>=60&&i<100){ cout<<((int) (10*0.1+10*0.075+20*0.05+20*0.03+(i-60)*0.015)/1000)*1000;continue;	}
+		if(i>100){        cout<<((int) (10*0.1+10*0.075+20*0.05+20*0.03+40*0.015+(i-100)*0.01)/1000)*1000;continue;	}
+	}
+}
--- a/入门篇/U4/4.1.1.cpp
+++ b/入门篇/U4/4.1.1.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"0\n\n25\n\n1#\n2$\n3\n4\n5\n\n25:28\n67:70";
+	while(true);
+} 
--- a/入门篇/U4/4.1.2.cpp
+++ b/入门篇/U4/4.1.2.cpp
@ -0,0 +1,25 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	long double s=1;
+	for(int i=2;i<=100;i++)
+	{
+		if(i%2==1) s=s-i;
+		else s=s+i;
+	}
+	cout<<int(s)<<endl;
+	s=0;
+	for(int i=1;i<=10;i++)
+	{
+		s=s+i*(11-i);
+	}
+	cout<<int(s)<<endl;
+	s=0;
+	for(int i=1;i<=100;i++)
+	{
+		s=s+1.0/i;
+	}
+	cout<<s;
+	while(true);
+}
--- a/入门篇/U4/4.1.3.cpp
+++ b/入门篇/U4/4.1.3.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	float n,s,p;
+	cin>>n;
+	for(int i=0;i<n;i++)
+	{
+		cin>>p;
+		s=s+p;
+	}
+	p=s/n;
+	cout<<int(p*100.0)/100.0;
+	while(true);
+}
--- a/入门篇/U4/4.1.4.cpp
+++ b/入门篇/U4/4.1.4.cpp
@ -0,0 +1,20 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	while(true)
+	{
+		
+	int n,b,s,a;
+	cin>>n;
+	cin>>s;
+	b=s+1;
+	for(int i=0;i<n-1;i++)
+	{
+		cin>>a;
+		if(a>b) b=a;
+		else if(a<s) s=a;
+	}
+	cout<<b-s<<endl<<endl;
+    }
+}
--- a/入门篇/U4/4.1.5.cpp
+++ b/入门篇/U4/4.1.5.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	unsigned long long s;
+	s=1;
+	for(int i=1;i<64;i++)
+	{
+		s=s+s*2;
+	}
+	long double t;
+	t=s/142000000;
+	cout<<t;
+	while(true);
+}
--- a/入门篇/U4/4.1.6.cpp
+++ b/入门篇/U4/4.1.6.cpp
@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	int s;
+	while(true)
+	{
+		cin>>n;
+		s=0;
+		for(int i=1;i*i<=n;i++)
+		{
+			if(n%i==0) s=s+2;
+			if(i*i==n) s=s-1;
+		}
+		cout<<s<<endl;
+	}
+}
--- a/入门篇/U4/4.1.7.cpp
+++ b/入门篇/U4/4.1.7.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n,a,b,c,a1,b1,c1;
+	while(true)
+	{
+		a=0;
+		b=0;
+		c=0;
+		cin>>n;
+	    for(int i=0;i<n;i++)
+	    {
+		cin>>a1>>b1>>c1;
+		a+=a1;
+		b+=b1;
+		c+=c1;
+	    }
+	    cout<<a<<" "<<b<<" "<<c<<" "<<a+b+c<<endl<<endl;
+	}
+}
--- a/入门篇/U4/4.1.8.cpp
+++ b/入门篇/U4/4.1.8.cpp
@ -0,0 +1,20 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a,b,s,f;
+	while(true)
+	{
+		cin>>s;
+		b=s+1;
+		a=a+s;
+		for(int i=0;i<9;i++)
+		{
+			cin>>f;
+			if(f>b) b=f;
+			if(f<s) s=f;
+			a=a+f;
+		}
+		cout<<(a-b-s)/8.0<<endl<<endl;
+	}
+}
--- a/入门篇/U4/4.1.9.cpp
+++ b/入门篇/U4/4.1.9.cpp
@ -0,0 +1,17 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int m,t,f;
+	while(true)
+	{
+		m=0;
+		cin>>t;
+		for(int i=0;i<10;i++)
+		{
+			cin>>f;
+			if(t+30>=f) m++;
+		}
+		cout<<m<<endl<<endl;
+	}
+}
--- a/入门篇/U4/4.2.1.cpp
+++ b/入门篇/U4/4.2.1.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"0 4201 987654321\n\n000  \n\n50 1 1";
+	while(true);
+} 
--- a/入门篇/U4/4.2.2.cpp
+++ b/入门篇/U4/4.2.2.cpp
@ -0,0 +1,26 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int f,i,s,a;
+	while(true)
+	{
+		i=0;
+		s=0;
+		cin>>f;
+		while(true)
+		{
+			a=f;
+			a=a/pow(10,i);
+			if(a==0) break;
+			else
+			{
+			a=a%10;
+			s=s+a;
+			i++;	
+			}
+		}
+		cout<<s<<endl;
+	}
+}
--- a/入门篇/U4/4.2.3.cpp
+++ b/入门篇/U4/4.2.3.cpp
@ -0,0 +1,17 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int m,n,b,i;
+	while(true)
+	{
+		cin>>m>>n;
+		b=(m>n)?m:n;
+		for(i=2;i<=b;i++)
+		{
+			if(m%i==0&&n%i==0) {cout<<"No"<<endl;break;}
+		}
+		if(!(m%i==0&&n%i==0)) cout<<"Yes"<<endl;
+	}
+}
--- a/入门篇/U4/4.2.4.cpp
+++ b/入门篇/U4/4.2.4.cpp
@ -0,0 +1,20 @@
+#include<iostream>
+#include<string>
+#include<sstream>
+using namespace std;
+int main()
+{
+	string j;
+	stringstream num;
+	int s,b,n;
+	while(true)
+	{
+		cin>>s>>b;
+		n=0;
+		num.flush();
+		for(int i=0;i<b-s+1;i++) num<<s+i;
+		num>>j;
+		for(int i=0;i<j.size();i++) if(j[i]=='2') n++;
+		cout<<n<<endl;
+	}
+}
--- a/入门篇/U4/4.2.5.cpp
+++ b/入门篇/U4/4.2.5.cpp
@ -0,0 +1,48 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int k;
+long long n;
+long double f(long long n)
+{
+	long double s=0;
+	for(int i=1;i<=n;i++)
+	{
+		s=s+1.0/i;
+	}
+	return s;
+}
+int main()
+{
+	while(true)
+	{
+		cin>>k;
+		if(k>=10) n=pow(k,4);
+		else{
+		if(k>=6) n=pow(k,3);
+		else n=k*k;
+	    }
+	    if(k<12){
+		while(f(n)<=k)n+=3;
+		if(f(n-1)>k) 
+		{if(f(n-2)>k) cout<<n-2<<endl;
+		else cout<<n-1<<endl;}
+		else cout<<n<<endl;}
+		else {
+			if(k>=14) n=pow(k,5);
+			if(k>=15) while(f(n)<=k) n+=4096;
+			else while(f(n)<=k) n+=2048;
+			if(f(n-2048)>k) n-=2048;
+			if(f(n-1024)>k) n-=1024;
+			if(f(n-512)>k) n-=512;
+			if(f(n-256)>k) n-=256;
+			if(f(n-128)>k) n-=128;
+			if(f(n-64)>k) n-=64;
+			if(f(n-32)>k) n-=32;
+			if(f(n-16)>k) n-=16;
+			while(f(n)>k) n--;
+			n++;
+			cout<<n<<endl;
+		}
+	}
+}
--- a/入门篇/U4/4.2.6.cpp
+++ b/入门篇/U4/4.2.6.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+#include<cmath>
+#include<string>
+using namespace std;
+int main()
+{
+	string a;
+	char f;
+	while(true)
+	{
+		cin>>a;
+		for(int i=0;i<a.size();i++)
+		{
+			f=a[i];
+			if(f>='A'&&f<='Z') f=(f-'A'+3)%26+'A';
+			if(f>='a'&&f<='z') f=(f-'a'+3)%26+'a'; 
+		    cout<<f;
+		}
+		cout<<endl<<endl;
+	}
+}
--- a/入门篇/U4/4.3.1.cpp
+++ b/入门篇/U4/4.3.1.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"001 0\n\n50 1 0\n\n8";
+	while(true);
+} 
--- a/入门篇/U4/4.3.2.cpp
+++ b/入门篇/U4/4.3.2.cpp
@ -0,0 +1,17 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	long double pi4=0;
+	long long n=1,j=1;
+	do
+	{
+		if(j%2==1) pi4=pi4+1.0/n;
+		else pi4=pi4-1.0/n;
+		n+=2;
+		j++;
+	}while(1.0/n>=0.000001);
+	cout<<pi4*4.0;
+	while(true);
+}
--- a/入门篇/U4/4.3.3.cpp
+++ b/入门篇/U4/4.3.3.cpp
@ -0,0 +1,14 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	double l=200,s=0;
+	do
+	{
+		s=s+l;
+		l/=2;
+	} while(l>=0.5);
+	cout<<s;
+	while(true);
+}
--- a/入门篇/U4/4.3.4.cpp
+++ b/入门篇/U4/4.3.4.cpp
@ -0,0 +1,27 @@
+#include<iostream>
+#include<string>
+#include<sstream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	stringstream num;
+	string j;
+	int a,b;
+	bool z,x;
+	while(true)
+	{
+		cin>>a;
+		z=0;
+		if(a<0){z=1;a=abs(a);}
+		b=0;
+		do
+		{
+			b=b*10+a%10;
+			a/=10;
+		}while(a>0);
+		a=b;
+		if(z==1) a=0-a;
+		cout<<a<<endl;
+	}
+}
--- a/入门篇/U4/4.3.5.cpp
+++ b/入门篇/U4/4.3.5.cpp
@ -0,0 +1,32 @@
+#include<cstdio> 
+using namespace std;
+int main()
+{
+	int x=1,y=1,n;
+	scanf("%d",&n);
+	bool f=1;
+	for(int i=1;i<n;i++)
+	{
+		if(f)
+		{
+			if(y>1) y--,x++;
+			else
+			{
+				f=0;
+				x++;
+			}
+		}
+		else
+		{
+			if(x>1) x--,y++;
+			else
+			{
+				f=1;
+				y++;
+			}
+		}
+	}
+	printf("%d/%d\n",y,x);
+	return 0;
+}
+
--- a/入门篇/U4/4.3.6.cpp
+++ b/入门篇/U4/4.3.6.cpp
@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n,a;
+	while(true)
+	{
+		cin>>n;
+		a=1;
+		while(n!=1)
+		{
+			if(n%2==0) n/=2;
+			else n=3*n+1;
+			a++;
+		} 
+		cout<<a<<endl;
+	}
+}
--- a/入门篇/U4/4.4.2.cpp
+++ b/入门篇/U4/4.4.2.cpp
@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		for(int i=0;i<n;i++)
+		{
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			for(int a=0;a<i*2+1;a++) cout<<"*";
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			cout<<endl;
+		}
+		cout<<endl;
+	}
+}
--- a/入门篇/U4/4.4.3.cpp
+++ b/入门篇/U4/4.4.3.cpp
@ -0,0 +1,25 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		for(int i=0;i<n;i++)
+		{
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			for(int a=1;a<=i*2+1;a++) cout<<a;
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			cout<<endl;
+		}
+		for(int i=1;i<=n-1;i++)
+		{
+			for(int a=0;a<i;a++) cout<<" ";
+			for(int a=1;a<=2*n-1-2*i;a++) cout<<a;
+			for(int a=0;a<i;a++) cout<<" ";
+			cout<<endl;
+		}
+		cout<<endl;
+	}
+}
--- a/入门篇/U4/4.4.4.cpp
+++ b/入门篇/U4/4.4.4.cpp
@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		for(int i=1;i<=n;i++)
+		{
+			for(int a=1;a<=i;a++) cout<<a<<"*"<<i<<"="<<a*i<<"  ";
+			cout<<endl;
+		}
+		cout<<endl;
+	}
+}
--- a/入门篇/U4/4.4.5.cpp
+++ b/入门篇/U4/4.4.5.cpp
@ -0,0 +1,19 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n,s,r,w,a;
+	while(true)
+	{
+		cin>>n;
+		a=0;
+		for(w=0;w<=n/50;w++)
+		{
+			for(r=0;r<=n/20;r++)
+			{
+				for(s=0;s<=100/10;s++) if(w*50+r*20+s*10==n) a++;
+			}
+		}
+		cout<<a<<endl;
+	}
+}
--- a/入门篇/U4/4.4.6.cpp
+++ b/入门篇/U4/4.4.6.cpp
@ -0,0 +1,23 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a,b;
+	while(true)
+	{
+		cin>>a;
+		do
+		{
+			b=0;
+			do
+			{
+				b=b+a%10;
+				a/=10;
+			}
+			while(a>0);
+			a=b;
+		}
+		while(a/10>0);
+		cout<<a;
+	}
+}
--- a/入门篇/U4/4.4.7.cpp
+++ b/入门篇/U4/4.4.7.cpp
@ -0,0 +1,26 @@
+#include<iostream>
+using namespace std;
+int zd(int a,int b)
+{
+	int ans=1;
+	for(int i=2;i<=(a<b?a:b);i++) if(a%i==0&&b%i==0) ans=i;
+	return ans;
+}
+int zx(int a,int b)
+{
+	return a*b/zd(a,b);
+}
+int main()
+{
+	int answer,x,y,p,q;
+	while(true)
+	{
+		answer=0;
+		cin>>x>>y;
+		for(p=x;p<=y;p++)
+		{
+			for(q=x;q<=y;q++) if(zd(p,q)==x&&zx(p,q)==y) answer++;
+		}
+		cout<<answer<<endl;
+	}
+}
--- a/入门篇/U4/4.5.1.cpp
+++ b/入门篇/U4/4.5.1.cpp
@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"9\n28\n2047\n\n\n";
+	cout<<"0\n1\n12\n\n\n";
+	cout<<"9\n28\n2047";
+	while(true);
+}
--- a/入门篇/U4/4.5.2.cpp
+++ b/入门篇/U4/4.5.2.cpp
@ -0,0 +1,17 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		do
+		{
+			cout<<"<EFBFBD><EFBFBD> "<<n/2<<"<EFBFBD><EFBFBD>"<<"<EFBFBD><EFBFBD> "<<n%2<<endl;
+			n/=2;
+		}
+		while(n>0);
+		cout<<endl;
+	}
+}
--- a/入门篇/U4/4.5.3.cpp
+++ b/入门篇/U4/4.5.3.cpp
@ -0,0 +1,17 @@
+#include<iostream>
+#include<cmath> 
+using namespace std;
+int main()
+{
+	long long a,b;
+	while(true)
+	{
+		cin>>a>>b;
+		a=a%10; 
+		for(int i=1;i<b;i++){
+			a=a*a;
+			a=a%10;
+		}
+		cout<<a<<endl;
+	}
+}
--- a/入门篇/U4/4.5.4.cpp
+++ b/入门篇/U4/4.5.4.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int j[13],a;
+	while(true)
+	{
+		for(int i=0;i<13;i++) j[i]=0;
+		for(int i=0;i<25;i++){
+			cin>>a;
+			j[a-1]=j[a-1]+1;
+		} 
+		for(int i=0;i<13;i++) if(j[i]<2) cout<<i+1;
+	}
+}
--- a/入门篇/U4/4.5.5.cpp
+++ b/入门篇/U4/4.5.5.cpp
@ -0,0 +1,12 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		cout<<pow(2,n)<<endl<<"============="<<endl;
+	}
+}
--- a/入门篇/U4/4.5.6.cpp
+++ b/入门篇/U4/4.5.6.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int n,m,k,x;
+	long long a;
+	while(true)
+	{
+		cin>>n>>m>>k>>x;
+		a=pow(10,k);
+		k=a%n;
+		cout<<(m*k+x)%n<<endl;
+	}
+}
--- a/入门篇/U4/4.6.1.cpp
+++ b/入门篇/U4/4.6.1.cpp
@ -0,0 +1,52 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int p;
+bool pan(int a,int b,int c,int d,int e,int f,int g,int h,int i)
+{
+	if((a<f&&f<i)&&(b<d&&g<h&&c<e)&&(a+b+d+f==f+g+h+i==i+e+c+a==p)) return 1;
+	else return 0;
+}
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>p;
+		n=0;
+		for(int a=1;a<=9;a++)
+		{
+			for(int b=1;b<=9;b++)
+			{
+				if(b==a) continue;
+				for(int c=1;c<=9;c++)
+				{
+					if(c==a||c==b) continue;
+					for(int d=1;d<=9;d++)
+					{
+						if(d==a||d==b||d==c) continue;
+						for(int e=1;e<=9;e++)
+						{
+							if(e==a||e==b||e==c||e==d) continue;
+							for(int f=1;f<=9;f++)
+							{
+								if(f==a||f==b||f==c||f==d||f==e) continue;
+								for(int g=1;g<=9;g++)
+								{
+									if(g==a||g==b||g==c||g==d||g==e||g==f) continue;
+									for(int h=1;h<=9;h++)
+									{
+										if(h==a||h==b||h==c||h==d||h==e||h==f||h==g) continue;
+										int i=45-a-b-c-d-e-f-g-h;
+										if(pan(a,b,c,d,e,f,g,h,i)) n++;
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+		cout<<n<<endl;
+	}
+}
--- a/入门篇/U4/4.6.2.cpp
+++ b/入门篇/U4/4.6.2.cpp
@ -0,0 +1,42 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int n;
+void pai(int &x,int &y)
+{
+	while(x>0&&y>0)
+	{
+		x--;
+		y--;
+	}
+}
+void pai2(int &x,int &y)
+{
+	while(x<=n&&y>0) 
+	{
+		x++;
+		y--;
+	}
+}
+int main()
+{
+	int i,j,xx,yy;
+	while(true)
+	{
+		cin>>n>>i>>j;
+		for(int x=1;x<=n;x++) cout<<"("<<i<<","<<x<<") ";
+		cout<<endl;
+		for(int x=1;x<=n;x++) cout<<"("<<x<<","<<j<<") ";
+		cout<<endl;
+		xx=j;
+		yy=i;
+		pai(xx,yy);
+		for(int ii=1;ii+xx<=n&&ii+yy<=n;ii++) cout<<"("<<ii+yy<<","<<ii+xx<<") ";
+		xx=j;
+		yy=i;
+		pai2(xx,yy);
+		cout<<endl;
+		for(int ii=1;xx-ii>0&&ii+yy<=n;ii++)  cout<<"("<<xx-ii<<","<<ii+yy<<") ";
+		cout<<endl;
+	}
+}
--- a/入门篇/U4/4.6.3.cpp
+++ b/入门篇/U4/4.6.3.cpp
@ -0,0 +1,21 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int n,a,b;
+	while(true)
+	{
+		cin>>n;
+		for(int i=2;i*i<n;i++)
+		{
+			if(n%i==0)
+			{
+				a=i;
+				b=n/a;
+				break;
+			}
+		}
+		cout<<((a>b)?a:b)<<endl;
+	}
+}
--- a/入门篇/U4/4.6.4.cpp
+++ b/入门篇/U4/4.6.4.cpp
@ -0,0 +1,33 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int money[12],ans,c,n;
+	bool j;
+	while(true)
+	{
+		j=1;
+		for(int i=0;i<12;i++) cin>>money[i];
+		ans=0;
+		c=0;
+		for(int i=0;i<12;i++)
+		{
+			n=300+ans;
+			if(n<money[i]) {
+				cout<<"-"<<i+1<<endl;
+				j=0;
+				break;
+			}
+			else
+			{
+				ans=n-money[i];
+				while(ans-100>=0) {
+					ans-=100;
+					c+=100;
+				}
+			}
+		}
+		if(j) cout<<c*1.2+ans<<endl;
+	}
+}
--- a/入门篇/U4/4.6.5.cpp
+++ b/入门篇/U4/4.6.5.cpp
@ -0,0 +1,28 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+bool z(int a)
+{
+	for(int i=2;i*i<=a;i++) if(a%i==0) return 0;
+	return 1;
+}
+int main()
+{
+	int a,b;
+	bool d;
+	while(true)
+	{
+		d=1;
+		cin>>a>>b;
+		for(int i=2;i<=((a<b)?a:b);i++) 
+		{
+			if(z(i)){
+			if(b%i==0)
+			{
+				if(a%i!=0) d=0;
+			}}
+		}
+		if(d) cout<<"Yes"<<endl;
+		else cout<<"No"<<endl;
+	}
+}
--- a/入门篇/U5/5.1.1.cpp
+++ b/入门篇/U5/5.1.1.cpp
@ -0,0 +1,6 @@
+#include<cstdio>
+int main()
+{
+	printf("3 7\n");
+	return 0;
+}
--- a/入门篇/U5/5.2.1.cpp
+++ b/入门篇/U5/5.2.1.cpp
@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n,sr[10000],li,w;
+	while(true)
+	{
+		cin>>n;
+		for(int i=0;i<n;i++) cin>>sr[i];
+		w=0;
+		for(int i=1;i<n;i++) if(sr[i]<sr[w]) w=i;
+		li=sr[w];
+		for(int i=w;i>0;i--) sr[i]=sr[i-1];
+		sr[0]=li;
+		for(int i=0;i<n;i++) cout<<sr[i]<<" ";
+		cout<<endl<<endl;
+	}
+}
--- a/入门篇/U5/5.2.2.cpp
+++ b/入门篇/U5/5.2.2.cpp
@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int d[10]={1,1,1,1,1,1,1,1,1,1};
+	int a=-1;
+	for(int i=1;i<=1000;i++) 
+	{
+		a+=i;
+		d[a%10]=0;
+	}
+	int i;
+	for(i=0;i<10;i++) if(d[i]==1) cout<<i+1<<"<EFBFBD><EFBFBD> ";
+	while(true);
+}
--- a/入门篇/U5/5.2.3.cpp
+++ b/入门篇/U5/5.2.3.cpp
@ -0,0 +1,13 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	bool p[52];
+	for(int i=0;i<52;i++) p[i]=1;
+	for(int i=2;i<=52;i++)
+	{
+		for(int a=1;a*i<=52;a++) p[a*i-1]=!p[a*i-1];
+	}
+	for(int i=0;i<52;i++) if(p[i]) cout<<i+1<<" ";
+	while(true);
+}
--- a/入门篇/U5/5.2.4.cpp
+++ b/入门篇/U5/5.2.4.cpp
@ -0,0 +1,29 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int L,M,l[100],r[100],tree[10001];
+	while(true)
+	{
+		cin>>L>>M;
+		for(int i=0;i<=L;i++)
+		{
+			cin>>tree[i];
+		}
+		for(int i=0;i<M;i++)
+		{
+			cin>>l[i]>>r[i];
+		}
+		for(int i=0;i<M;i++)
+		{
+			if(r[i]-l[i]>100) r[i]=l[i]+100;
+		}
+		for(int i=0;i<M;i++)
+		{
+			for(int a=0;a<r[i]-l[i]+1;a++)
+			{
+				cout<<tree[l[i]+a]<<" ";
+			}
+		}
+	}
+}
--- a/入门篇/U5/5.2.5.cpp
+++ b/入门篇/U5/5.2.5.cpp
@ -0,0 +1,23 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+bool pan(int a)
+{
+	do
+	{
+		if(a%10==0) return 0;
+		a/=10;
+	}
+	while(a>0);
+	return 1;
+}
+int main()
+{
+	int x=sqrt(111111111)+1,a;
+	for(;x*x<=999999999;x++)
+	{
+		a=x*x; 
+		if(pan(a)) cout<<x<<"^2="<<a<<endl;
+	}
+    while(true); 
+}
--- a/入门篇/U5/5.3.1.cpp
+++ b/入门篇/U5/5.3.1.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"C";
+	while(true);
+}
--- a/入门篇/U5/5.3.10.cpp
+++ b/入门篇/U5/5.3.10.cpp
@ -0,0 +1,49 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int n,m,find,j,w;
+	long long sr1[100000],sr2[10000];
+	while(true)
+	{
+		cin>>n;
+		for(int i=0;i<n;i++) cin>>sr1[i];
+		//===================================
+		bool b;
+        double x;
+        for(int i=n-1;i>0;i--)
+        {
+            b=1;
+	        for(int j=0;j<i;j++)
+	        {
+	            if(sr1[j]>sr1[j+1]){
+		            x=sr1[j];
+		            sr1[j]=sr1[j+1];
+		            sr1[j+1]=x;
+                    b=0;
+		        }	
+	        }
+            if(b) break;
+        }
+        //=======================================
+		cin>>m;
+		for(int i=0;i<m;i++) cin>>sr2[i];
+		for(int ii=0;ii<m;ii++)
+		{
+			find=sr2[ii];
+			w=n-1;
+			j=sr1[w]-find;
+			j=abs(j);
+			for(int i=n-2;i>=0;i--)
+			{
+				if(abs(sr1[i]-find)<j)
+				{
+					j=abs(sr1[i]-find);
+					w=i;
+				}
+			}
+			cout<<sr1[w]<<endl;
+		}
+	}
+}
--- a/入门篇/U5/5.3.2.cpp
+++ b/入门篇/U5/5.3.2.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"B";
+	while(true);
+}
--- a/入门篇/U5/5.3.3.cpp
+++ b/入门篇/U5/5.3.3.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"B";
+	while(true);
+}
--- a/入门篇/U5/5.3.4.cpp
+++ b/入门篇/U5/5.3.4.cpp
@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"C";
+	while(true);
+}
--- a/Show More
+++ b/Show More